# Adapted from
# https://github.com/NVIDIA/Megatron-LM/blob/core_r0.8.0/megatron/core/packed_seq_params.py
# Copyright (c) 2025 Huawei Technologies Co., Ltd. All Rights Reserved.
# Copyright (c) 2022, NVIDIA CORPORATION. All rights reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

from dataclasses import dataclass

from torch import Tensor


@dataclass
class PackedSeqParams:
    # parameters to TEDotProductAttention and fused rope kernels for the `thd` (packed) sequence format,
    qkv_format: str = None
    cu_seqlens_q: Tensor = None
    cu_seqlens_kv: Tensor = None
    max_seqlen_q: Tensor = None
    max_seqlen_kv: Tensor = None
    cu_seqlens_q_padded: Tensor = None
    cu_seqlens_kv_padded: Tensor = None
